As you come from childhood, you come from being a savage animal without any awareness of your habits.
What you should be doing internally right now. Is walking down the behaviors that you have, categorizing them and then preventing them from happening.
That is what a human would do. We learn from patterns, we introspect. You need IQ points for that.
Children who are just born into this world are not capable of that. Well some are more capable than others, but it usually takes experience, some age to truly grow a better awareness of your own self.
It is a hard thing to do for a lot of people, some will never learn. That is why there are so many fat people.
Introspection is basically a higher state of awareness. As you breathe, you can also control breathing, but since your awareness is inside of your brain, and your brain also controls breathing. Usually its part of the subconscious mind that you have no access to.
In the same way that you would perhaps learn how to control your heart beats (through meditation), your aware parts of the brain, can also come across automated parts of your brain, and then control them. Though its far easier for food cravings.
Its hard to describe as to what you should be doing. But basically, most likely your brain is too small to grasp at the finer details at life, the smaller the brain, the more part of your behaviors are of your "operational mode".
You are not aware of what you are doing, because around those automated systems you do not have correction systems. Like an v6 car engine, you cant disable, or slow down one of your cylinders. If one of them breaks down, your automated systems are not capable of isolating that one. Your whole engine therefore simply breaks down eventually.